ML17275A616

Deficiency Rept Re Primary Containment Pressure Monitoring Instrumentation Sensing Line Routing to Initiate Eccs.Ped 220-I-324 & -329 Issued,Reassigning Instrumentation Sensing Lines to Penetrations Below Instrument Rack Elevation

ML17275A616
Person / Time
Site:	Columbia
Issue date:	09/24/1980
From:	Renberger D WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
References
10CFR-050.55E, 10CFR-50.55E, G2-80-211, GO2-80-211, NUDOCS 8009300415
Download: ML17275A616 (6)

Text

j REGUL RY INFORMATION DISTRIBUTI SYSTEM (RIDS)

ACCESSION NBR:8009300415 DOC DATE: 80/09/24

~ NOTARIZED! NO DOCKET FACIL:50-397 NPPSS Nuclear Pro]ect~ Unit 2i Washington Public Powe 05000397 AUTH'AME AUTHOR AFFILIATION RENBERGER,D.L, Washington Public Power Supply System RECIP ~ NAME RECIPIENT AFFILIATION

SUBJECT:

Deficiency rept re primary containment pressure monitoring instr'umentation sensing line routIng to, initiate ECCS.PED 220-I-324 8 -329 jssuedire-assigning instrumentation sensing lines to penetrat,iona below instrument rack elevation.

DISTRIBUTION CODE: B019S COPIES RECEIVED:LiTR / ENCLi, TITLE: Construction Deficiency Report (10CFR50.55E)

SIZE:

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Washington Public Power Supply System A JOINT OPERATING AGENCY P. O. Box QOS 3000 Gco. WASHIHGvON W*v RICHLANO. WAsHINGZON QQ352 PHONE (50Q) 375 5000 September 24, 1980 G02-80-211 Docket No. 50-397 Nuclear Regulatory Commission Region V Suite 202, Walnut Creek Plaza 1900 North California Blvd.

Walnut Creek, CA 94596 Attention: Mr. R. H. Engelken, Director Gentlemen:

Subject:

WPPSS NUCLEAR PROJECT NO. 2 DOCKET NO ~ 50-397, CPPR-93 REPORTABLE DEFICIENCY - 10CFR50.55 e In accordance with the provisions of 10CFR50.55(e), your staff was informed by telephone on August 27, 1980 of a reportable deficiency relative to Primary Containment pressure monitoring instrumentation sensing line routing. These lines were routed such that low points were formed which will vative pressure indication.

fill with condensate resulting in non-conser-Attached is our report on this deficiency.

Please contact us if you have any questions.

Very truly yours, D. L. RENBERGER Assistant Director, DLR:GWB:cd Technology attachment cc: JR Lewis - BPA ND Lewis - EFSEC V.

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Snaith - B&R NRC go/g AD Toth - NRC 5 JJ Verderber - B8R B. Wood - NUS WNP-2 Files g/]

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e REPORTABLE DEFICIENCY AND CORRECTIVE ACTION HPPSS NUCLEAR PROJECT NO. 2 PRIMARY CONTAINMENT PRESSURE MONITORING INSTRUMENTATION SENSING LINE ROUTING HASHINGTON PUBLIC POHER SUPPLY SYSTEM DOCKET NO. 50-397 LICENSE NO. CPPR-93 DESCRIPTION OF DEFICIENCY:

The reported deficiency involves the routing of the sensing lines for the Primary Containment pressure monitoring instrumentation used to initiate ECCS. The Containment penetrations originally assigned to these instrument sensing lines are located above the instrument rack elevations which house the pressure monitoring instrumentation. These lines were routed from the penetrations down to the bottom of the instrument racks and then back up to the instruments forming a low point. Condensate wi 11 then form in the line low point .resulting in non-conservative pressure indication.

SAFETY IMPLICATIONS:

Non-conservative Primary Containment pressure indication will result in a delay of ECCS initiation.

CORRECTIVE ACTION:

PED's 220-I-324 and -329 have been issued to reassign the Containment Pressure monitoring instrumentation sensing lines to Containment penetrations located below the instrument rack elevation and to remove any low points in the line route.

GHB/cd 9-19-80